Window-envelop.



0. EKV'ALL. WINDOW ENVELOP.

APPUCATION ElLED FEB. 10, I917.

1,256,59 Patented F@b.19,1918..

CARL 0. EKVALL, 0F BROOKLYN, NEW YORK.

WIND OW-ENVELOP.

Specification of Letters Patent.

Patented. Feb. 19, 19918..

Application filed February 10, 1917. Serial No. 147,748.

T 0 all whom it may concern:

Be it known that I, CARL O. EKVALL, a citizen of the United States, and a resident of the borough of Brooklyn, city of New York, county of Kings, and State of New York, have invented a new and useful Improvement in Window-Envelops, of which the following is a'i'ull, clear, and exact description.

My invention relates to improvements in window envelops, and more particularly to the transparent patch whichis used to cover the opening in the envelop. Usually these patches are pasted, and a gripping device grasps one edge of the patch, pulls it across the envelop blank, and as the envelop is formed the patch is placed across the opening and pressed to place, various mechanisms being used for this purpose. In making standard envelops, however, a difficulty has been found in that where the edge which comes across the bottom told of the envelop is left straight and plain, the turned up edge lying in the envelop bottom interferes with the proper insertion of the letter sheet or other matter which is inserted in the envelop. I have found, however, that by making the lower edge of the patch of irregular outline, or in other words providing extensions which can be engaged by the grippers and which will lie across the fold, this difiiculty is obviated without interfering with the gripping mechanism or the proper placing of the patch. The extensions being small and separated are folded over with the envelop blank, but they form such divided resistance to the insert that they double up and adjust themselves one side or the other of the insert, and so do not in the least interfere with it, and the envelop when so constructed is free from the objections noted, all of which will appear clearly from the description which follows.

Reference is to be had to the accompanying drawings forming a part of this speci-v ficatioli, in which similar reference char-' acters indicate corresponding parts in all the views.

Figure l is a plan or development of the patch. t

Fig. 2 is a broken rear elevation of an envelop with the patch and its extensionsin place, and

Fig. 3 is a broken envelop with the ire view or. the can, showing ordinary machine for the purpose.

how the extensions dispose themselves with relation to the letter sheet or other insert.

The patch 10 is of transparent paper as usual, and it is adapted to be placed over the opening or window 11 in the envelop 12, precisely as usual. One edge of the patch, however, is preferably the lower edge, is of irregular contour, and the most convenient and economical way of constructing it is to provide extensions n which can be grasped by the. gripper which pulls the patch over the opening 11 in the envelop l0.

In practiced have used extensions such as shown in Fig. 1, arranged in groups of pointed extensions 14: disposed preferably near the ends and middle portion of the patch, but the outline of the extensions and their arrangement, is not material, and they could be varied to suit various gripping mechanismsf lii an envelop machihe the patches are piled one on the other and grasped'one by one, padted, placed on the inside of the envelop blank, and pressed to place while the blank is folded. It will be seen that where the extensions are used they will lie across the lower fold of the envelop as shown in Figs. 2 and 3, but will leave no turned up solid edge to interfere with an insert, as for instance 15 in Fin. 8, but the part which crosses the fold Wlli in the form of extensions as shown, the

insert is made (see Fig. 8) some or t em may lie one side of the sheet shown by dotted lines, and the others on the opposite side as shown in full lines, or they will double up and dispose themselves in the or fold of the envelop so that they will not in any way interfere with the insert.

it will be readily seen that these extensions may be of any desired for: numher, and that the important thing is to have one edge of the blank, that is the which crosses the fold, of irregular outline that the solid edge will be broken up to meet the conditions heretofore specified.

It will further be noticed that this construction does not in any way interfere with theme and application of the patch in any Where the type of machine is used and style of envelop made which makes it certain that the edge of the patch will not ex- .e 1 r third to the fold or tne envelop, it is obvious that a patch such, as l have shown and de- I5 interfere therewith.

scribed having a serrated edge, has no function and would be of no use; but withniany types of standard envelop machines. and with certain styles of envelops, particularly the ordinary note envelop, it is practically impossible to adjust the mechanism so as to allix the patch in the manne above stated, but almost invariably the patch will slide so that one edge will be folded up and lie against the envelop back, and in such case the solid edge prevents the easy placing of an insert in the envelop, whereas the serrated or broken edge separates, doubles over and adjusts itself to the insert so as not to My invention, therefore, is applicable to such cases where the envelops and machines cannot in ordinary practice be adjusted to prevent the folding over of a part of the patch with the envelop sheet.

I claim 1. As an improved article of manufacture a window envelop having the patch arranged to overlap the fold between the front and back of the envelop, and with the upturned edge broken or irregular in contour. 2. As an improved article of manufacture, a window envelop having the patch which covers the window provided with an irregular or broken lower edge whereby when the said edge is turned up it offers a broken obstruction to an insert. in the envel pl CARL t). EKVALL. Witnesses:

RICHARD B. llaos'raon, ALrann SUKES. 

